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Non-Invasive Airway Mechanics Parameters

Name
Units
Description
f
BPM
Frequency of breathing 
TV
ml
Tidal Volume, volume inspired during one breath
MV
ml
Minute Volume, volume inspired in one minute
tE
s
Expiration time
tI
s
Inspiration time
tR
s
Relaxation time,
PIf
mls-1
Peak inspiratory flow
Pef
mls-1
Peak expiratory flow
DT
ms
Delta Time, time lag of the nasal flow at the onset of expiration 
SRaw
cmH2O per s
Specific Airway Resistance 
SGaw
1/cmH20 per s
Specific Airway Conductance 
 
(c) EMMS